Breakthrough Listen Follow-up of a Transient Signal from the RATAN-600

While we await with interest a formal write-up of the RATAN-600 result, the claim that the detection could be a signal from an extraterrestrial civilization has attracted much media interest.

In this memo, we briefly report on our own follow-up observations, undertaken using the new Breakthrough Listen back-end instrument at the Green Bank Telescope (GBT). This preliminary analysis will be followed up in time with a more formal refereed publication of the initial scientific results from Breakthrough Listen.